/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.piston.launcher;

import com.piston.app.R;
import com.piston.app.R.id;

import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.LinearLayout;

/**
 * Represents a set of icons chosen by the user or generated by the system.
 */
public class Folder extends LinearLayout implements DragSource,
		OnItemLongClickListener, OnItemClickListener, OnClickListener,
		View.OnLongClickListener {

	protected AbsListView mContent;
	protected DragController mDragController;

	protected LauncherNew mLauncher;

	protected Button mCloseButton;

	protected FolderInfo mInfo;

	/**
	 * Which item is being dragged
	 */
	protected ShortcutInfo mDragItem;

	/**
	 * Used to inflate the Workspace from XML.
	 * 
	 * @param context
	 *            The application's context.
	 * @param attrs
	 *            The attribtues set containing the Workspace's customization
	 *            values.
	 */
	public Folder(Context context, AttributeSet attrs) {
		super(context, attrs);
		setAlwaysDrawnWithCacheEnabled(false);
	}

	@Override
	protected void onFinishInflate() {
		super.onFinishInflate();

		mContent = (AbsListView) findViewById(R.id.folder_content);
		mContent.setOnItemClickListener(this);
		mContent.setOnItemLongClickListener(this);

		mCloseButton = (Button) findViewById(R.id.folder_close);
		mCloseButton.setOnClickListener(this);
		mCloseButton.setOnLongClickListener(this);
	}

	public void onItemClick(AdapterView parent, View v, int position, long id) {
		ShortcutInfo app = (ShortcutInfo) parent.getItemAtPosition(position);
		int[] pos = new int[2];
		v.getLocationOnScreen(pos);
		app.intent.setSourceBounds(new Rect(pos[0], pos[1], pos[0]
				+ v.getWidth(), pos[1] + v.getHeight()));
		mLauncher.startActivitySafely(app.intent, app);
	}

	public void onClick(View v) {
		mLauncher.closeFolder(this);
	}

	public boolean onLongClick(View v) {
		mLauncher.closeFolder(this);
		mLauncher.showRenameDialog(mInfo);
		return true;
	}

	public boolean onItemLongClick(AdapterView<?> parent, View view,
			int position, long id) {
		if (!view.isInTouchMode()) {
			return false;
		}

		ShortcutInfo app = (ShortcutInfo) parent.getItemAtPosition(position);

		mDragController.startDrag(view, this, app,
				DragController.DRAG_ACTION_COPY);
		mLauncher.closeFolder(this);
		mDragItem = app;

		return true;
	}

	public void setDragController(DragController dragController) {
		mDragController = dragController;
	}

	public void onDropCompleted(View target, boolean success) {
	}

	/**
	 * Sets the adapter used to populate the content area. The adapter must only
	 * contains ShortcutInfo items.
	 * 
	 * @param adapter
	 *            The list of applications to display in the folder.
	 */
	void setContentAdapter(BaseAdapter adapter) {
		mContent.setAdapter(adapter);
	}

	void notifyDataSetChanged() {
		((BaseAdapter) mContent.getAdapter()).notifyDataSetChanged();
	}

	void setLauncher(LauncherNew launcher) {
		mLauncher = launcher;
	}

	/**
	 * @return the FolderInfo object associated with this folder
	 */
	FolderInfo getInfo() {
		return mInfo;
	}

	// When the folder opens, we need to refresh the GridView's selection by
	// forcing a layout
	void onOpen() {
		mContent.requestLayout();
	}

	void onClose() {
		final Workspace workspace = mLauncher.getWorkspace();
		workspace.getChildAt(workspace.getCurrentScreen()).requestFocus();
	}

	void bind(FolderInfo info) {
		mInfo = info;
		mCloseButton.setText(info.title);
	}
}
